It's coming together, but I hit the first couple snags. All of my mold lines landed just about exactly where I wanted them. The front of the slide came out perfectly; the vents look fantastic, the engravings are sharp, the front sight came out wonderfully.
The rear caused some problems though. Too complex of geometry around the rear sight, and some trouble with the extractor. You can also see I wasn't as thorough with cleaning in some of those crevices... Luckily, the buildup didn't seem to affect the silicon setting.
Removing the extractor and molding it separately lends itself to more trouble than I care to deal with (unless I have to), so I'm going to leave this alone and see how it looks on the final pieces that come out of the next mold. However, the rear sight can be easily replicated with a small one piece mold, so I'll be popping that off for my next attempt on the top half of the slide mold.
So I'll be taking another stab at the first part of the slide mold again this weekend. As for the rest of the gun... the trigger control group has a TON of tricky shapes that have been obnoxious to try and mask off to make the mold.
Before I go through the process of removing all the guts of this, and cause myself a nightmare level of cleaning silicon out of an epic amount of hard-to-reach crevices; I wondered if I could just use a cheap $100 airsoft gbb lower to make the mold. Airsoft guns can be pretty accurate, but often are made so they don't always fit real-steel parts. How close is the replica? Is it worth $100 to gamble on that?
Maybe.. but it's definitely worth $15 to find out, and it happens that the same company has a $15 springer pistol (albeit with a P99 mag release instead of the PPQ) that I could test with. There are times I love Amazon Prime shipping, and this is one of those times.
As it turns out, Umarex's replicas are ..scarily.. exact. All of the major components are interchangeable. Truthfully, I may even do a separate how-to on converting these $15 suckers into Q5 Match con safe props for you guys and gals that don't have access to a real Q5, but that's a whole different animal.
Yes. The slide of my real-steel Walther fits perfectly on this $15 toy.
Now that I know this company has a true 1:1 replica, I'm going to order their gas PPQ (which has the correct mag release and grip design). I'm hoping to attempt the slide again in the next few days; fingers crossed it all goes well!